As filed with the Securities and Exchange Commission on August 23, 2005
                                                     Registration No. 333-126108

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                           -------------------------

                         Post-Effective Amendment No. 1
                                       To
                                    FORM S-3
                             REGISTRATION STATEMENT
                                     Under
                           The Securities Act Of 1933

                           -------------------------

                               GSE SYSTEMS, INC.
             (Exact name of registrant as specified in its charter)
           Delaware                                   52-1868008
  (State or other jurisdiction                    (I.R.S. Employer
 of incorporation or organization)              Identification Number)
                              9189 Red Branch Road
                               Columbia, MD 21045
                                 (410) 772-3500
               (Address, including zip code, and telephone number,
       including area code, of registrant's principal executive offices)

                                 John V. Moran
                            Chief Executive Officer
                               GSE Systems, Inc.
                              9189 Red Branch Road
                               Columbia, MD 21045
                                 (410) 772-3500
                              Fax: (410) 772-3599
              (Name and address, including zip code, and telephone
               number, including area code, of agent for service)

                           -------------------------

                                    Copy to:

                             Robert J. Hasday, Esq.
                                Duane Morris LLP
                              380 Lexington Avenue
                               New York, NY 10168
                                 (212) 692-1000
                              Fax: (212) 692-1020


    
     Approximate date of commencement of proposed sale to the public: As soon as
practicable after the effective date of this Registration Statement.
    
     If the only  securities  being  registered  on this form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. [  ]
    
     If any of the securities being registered on this form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]
    
     If this form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. [  ]
    
     If this form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [  ]
    
     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box. [  ]
    

                           -------------------------
   
     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the  Securities  Act of 1933 or until the  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.

--------------------------------------------------------------------------------

                                Explanatory Note

This  Post-Effective  Amendment No. 1 is being filed for the purpose of updating
the "Where You Can Find More Information"  and  "Risk Factors" sections  of  the
prospectus included in Registrant's initial  Registration  Statement on Form S-3
(File No. 333-126108).


The  information  in this  prospectus  is not complete  and may be changed.  The
selling  stockholders  named in this  prospectus  may not sell these  securities
until  the  registration  statement  filed  with  the  Securities  and  Exchange
Commission  is  effective.  This  prospectus  is  not an  offer  to  sell  these
securities  and it is not  soliciting  an offer to buy these  securities  in any
state where the offer or sale is not permitted.

                  SUBJECT TO COMPLETION, DATED AUGUST 23, 2005

PROSPECTUS


                               GSE SYSTEMS, INC.

                        1,503,030 Shares of Common Stock


     We have prepared this  prospectus to allow Dolphin Direct Equity  Partners,
L.P.,  the selling  stockholder,  to sell up to  1,503,030  shares of our common
stock issuable upon conversion of a senior subordinated secured convertible note
or exercise of a warrant  issued to the selling  stockholder  by us. We will not
receive  any  proceeds   from  shares  of  common  stock  sold  by  the  selling
stockholder.

     The selling  stockholder  identified in this  prospectus,  or its pledgees,
donees, transferees or other  successors-in-interest,  may offer the shares from
time to time through public or private transactions at prevailing market prices,
at prices related to prevailing market prices or at privately negotiated prices.

     Our common stock is listed on the American  Stock Exchange under the symbol
"GVP." On August 22,  2005,  the closing  sale price of the common  stock on the
American Stock Exchange was $1.65.

    
     Investing in our common stock involves risks. See "Risk Factors"  beginning
on page 3.
    
     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or disapproved of these securities or determined if this
prospectus  is truthful or  complete.  Any  representation  to the contrary is a
criminal offense.

                  The date of this Prospectus is August , 2005


                               TABLE OF CONTENTS
                                                                            Page
THE COMPANY....................................................................3
RISK FACTORS...................................................................3
THE FINANCING..................................................................7
SELLING STOCKHOLDER............................................................9
USE OF PROCEEDS...............................................................10
PLAN OF DISTRIBUTION..........................................................10
LEGAL MATTERS.................................................................12
EXPERTS.......................................................................12
WHERE YOU CAN FIND MORE INFORMATION...........................................12

     You should rely only on the  information  contained in this  document or to
which we have  referred you. We have not  authorized  anyone to provide you with
information that is different.  This document may only be used where it is legal
to sell these securities.  The information in this document may only be accurate
on the date of this document.

               Special Note Regarding Forward-Looking Statements
    
     This prospectus contains  "forward-looking"  statements that have been made
pursuant to the Private  Securities  Litigation Reform Act of 1995 which reflect
our expectations regarding our future growth, results of operations, performance
and business  prospects  and  opportunities.  Wherever  possible,  words such as
"anticipate," "believe," "plan," "expect" and similar expressions have been used
to identify  these  forward-looking  statements.  These  statements  reflect our
current  beliefs  and  are  based  on  information  currently  available  to us.
Accordingly, these statements are subject to risks and uncertainties,  including
those listed under "Risk Factors," which could cause our actual growth, results,
performance  and  business  prospects  and  opportunities  to differ  from those
expressed in, or implied by, these statements.  Except as otherwise  required by
federal  securities  law,  we are  not  obligated  to  update  or  revise  these
forward-looking statements to reflect new events or circumstances.

                                  THE COMPANY
       
     GSE Systems, Inc. ("GSE Systems," "GSE," the "Company," or "we" or "us") is
a leader in real-time, high fidelity simulation. The Company provides simulation
solutions and services to the nuclear and fossil electric utility industry,  the
chemical  and  petrochemical  industries  and  to the US  Military  Complex.  In
addition,  the Company provides plant monitoring and signal analysis  monitoring
and optimization software primarily to the power industry. Our executive offices
are located at 9189 Red Branch Road,  Columbia,  Maryland  21045.  Our telephone
number is (410) 772-3500. We maintain a Web site at http://www.gses.com. Nothing
contained in such Web site should be deemed a part of this prospectus.

                                  RISK FACTORS
       
     You should  carefully  consider the risks  described below before making an
investment decision. The risks and uncertainties  described below may not be the
only ones we will face.  Additional risks and  uncertainties not presently known
to us or that we  currently  deem not  material  may also  impair  our  business
operations.  If  any  of the  following  risks  actually  occur,  our  business,
financial  condition  or results of  operations  could be  materially  adversely
affected. In such case, the trading price of our common stock could decline, and
you may lose all or part of your investment.
       
     The  Company  has  limited  cash  resources.  If the  Company  is unable to
generate adequate cash flow from operations,  it will need additional capital to
fund its operations.
       
     For the years ended December 31, 2003 and 2002, the Company experienced net
losses  from   continuing   operations   of  $1.9  million  and  $4.3   million,
respectively,  and had only $82,000 of income from continuing operations for the
year ended  December 31,  2004.  The Company also had a net loss of $1.6 million
for the first six months of fiscal 2005.  The  Company's  backlog has  decreased
from $30.4  million at December  31, 2003 to $19.6  million at December 31, 2004
and $14.7  million at June 30, 2005.  The Company has cash  available  through a
credit facility of $1.5 million, of which $725,000 had been utilized at June 30,
2005. In addition,  as described herein, the Company recently issued and sold to
an investor a senior subordinated  secured convertible note of the Company and a
warrant to purchase  shares of our common stock for an aggregate  purchase price
of $2,000,000.  However, if the Company's income from continuing operations does
not improve, it may need additional capital to fund its operations.  If adequate
funds are not available, GSE may be required to curtail its operations.
       
     The Company is  controlled by the Company's  principal  stockholder,  whose
interests may not be aligned with those of the Company's other stockholders.
       
     As of August 23,  2005, GP Strategies Corporation  ("GP  Strategies")  owns
approximately 57% of GSE's outstanding common stock. Accordingly,  GP Strategies
controls  the  Company's  business  and  affairs,   including  the  election  of
individuals  to the board of directors,  and the outcome of actions that require
stockholder  approval including mergers,  sales of assets, and to prevent, or to
cause, a change of control of the Company.
       
     On  January  1,  2004,  the  Company  entered  into a  Management  Services
Agreement  with GP  Strategies  Corporation  in which GP  Strategies  agreed  to
provide corporate support services to GSE, including accounting,  finance, human
resources,  legal,  network  support  and tax.  In  addition,  GSE uses  General
Physics' financial system.  (General Physics is a GP Strategies  subsidiary.) In
2004, GSE was charged $685,000 for General Physics' services.  The agreement has
been  extended  through  December  31, 2005  without an increase in the fee. The
agreement can be renewed for successive one-year terms.
       
     In addition,  the Company  does not have an  independent  credit  facility;
instead,  $1.5 million of General  Physics'  available  credit facility has been
carved out for use by the Company.
       
     The Company's principal stockholder intends to spin-off its interest in the
Company.
       
     On June 21, 2005, GP Strategies  announced  that it intends to spin-off its
interest  in  the  Company   through  a  special   dividend  to  GP  Strategies'
stockholders.  The Company's  business has historically  relied on GP Strategies
for various  services,  including the provision of a portion of General Physics'
available credit facility, as described above. GP Strategies may be less willing
to provide assistance or services to the Company after the spin-off.
       
     The Company's  expense levels are based upon its  expectations as to future
revenues,  so it may be unable to adjust  spending to  compensate  for a revenue
shortfall.   Accordingly,   any   revenue   shortfall   would   likely   have  a
disproportionate effect on the Company's operating results.
       
     The  Company's  revenues  were $29.5  million and $25.0 million in 2004 and
2003,  respectively,  and $13.0  million for the six months ended June 30, 2005.
The Company's  operating  results have  fluctuated in the past and may fluctuate
significantly  in the  future  as a result of a variety  of  factors,  including
purchasing patterns,  timing of new products and enhancements by the Company and
its  competitors,   and  fluctuating  foreign  economic  conditions.  Since  the
Company's  expense  levels  are based in part on its  expectations  as to future
revenues and includes  certain fixed costs,  the Company may be unable to adjust
spending in a timely  manner to  compensate  for any revenue  shortfall and such
revenue  shortfalls  would  likely  have a  disproportionate  adverse  effect on
operating results.  The Company believes that these factors may cause the market
price for its common stock to fluctuate, perhaps significantly.  In addition, in
recent years the stock market in general, and the shares of technology companies
in particular,  have  experienced  extreme  price  fluctuations.  The  Company's
common stock has also  experienced a relatively  low trading  volume,  making it
further susceptible to extreme price fluctuations.
       
       Risk of International Sales and Operations.
       
     Sales of products and the  provision  of services to end users  outside the
United States accounted for  approximately  65.1% of the Company's  consolidated
revenue in 2004. The Company  anticipates that international  sales and services
will  continue  to  account  for a  significant  portion  of its  revenue in the
foreseeable  future.  As a result,  the Company may be subject to certain risks,
including  risks  associated  with the  application and imposition of protective
legislation and regulations  relating to import or export  (including  export of
high  technology  products) or otherwise  resulting from trade or foreign policy
and risks associated with exchange rate  fluctuations.  Additional risks include
potentially  adverse  tax  consequences,  tariffs,  quotas  and other  barriers,
potential  difficulties involving the Company's strategic alliances and managing
foreign sales agents or representatives  and potential  difficulties in accounts
receivable  collection.  The  Company  currently  sells  products  and  provides
services to customers  in emerging  market  economies  such as Russia,  Ukraine,
Bulgaria,  and the Czech Republic.  Although end users in the Ukraine  accounted
for 20.7%, 28.7%, and 22.8% of the Company's consolidated revenue in 2004, 2003,
and 2002, respectively, GSE's customer for these projects was Battelle's Pacific
Northwest  National  Laboratory,  which  is the  purchasing  agent  for the U.S.
Department of Energy ("DOE").  The DOE provides  funding for various projects in
Eastern  and  Central  Europe.  Accordingly,  the  Company is not subject to the
political and financial risks that are normally faced when doing business in the
Ukraine.  The Company has taken steps  designed to reduce the  additional  risks
associated with doing business in these countries, but the Company believes that
such risks may still exist and include,  among  others,  general  political  and
economic instability,  lack of currency  convertibility,  as well as uncertainty
with  respect to the  efficacy  of  applicable  legal  systems.  There can be no
assurance that these and other factors  will not have a material  adverse effect
on the Company's business, financial condition or results of operations.
       
     The  Company  relies  on one  customer  for a  substantial  portion  of its
revenue. The loss of this customer would have a material adverse effect upon the
Company's revenues and results of operations.
       
     For the years  ended  December  31,  2004,  2003,  and 2002,  one  customer
(Battelle's Pacific Northwest National  Laboratory)  accounted for approximately
24.0%, 28.7%, and 22.8%,  respectively,  of the Company's  consolidated revenue.
The Pacific  Northwest  National  Laboratory is the purchasing agent for the DOE
and the numerous projects the Company performs in Eastern and Central Europe. If
the Company lost this customer,  the Company's revenue and results of operations
would be materially and adversely affected.
       
     The Company's  business is substantially  dependent on sales to the nuclear
power  industry.  Any disruption in this industry would have a material  adverse
effect upon the Company's revenue.
       
     In  2004,  85% of our  revenue  was from  customers  in the  nuclear  power
industry.  The  Company  will  continue to derive a  significant  portion of its
revenue from customers in the nuclear power industry for the foreseeable future.
The  Company's  ability to supply  nuclear  power plant  simulators  and related
products and services is dependent on the  continued  operation of nuclear power
plants and, to a lesser extent, on the construction of new nuclear power plants.
A wide range of factors  affect the  continued  operation  and  construction  of
nuclear power plants,  including the political and regulatory  environment,  the
availability and cost of alternative means of power  generation,  the occurrence
of future nuclear incidents, and general economic conditions.
       
     The Company's available credit facility imposes  significant  operating and
financial  restrictions,  which may  prevent it from  capitalizing  on  business
opportunities.
       
     GSE's  available  credit  facility,  which has been  carved  out of General
Physics'  credit   facility,   imposes   significant   operating  and  financial
restrictions. These restrictions affect, and in certain cases limit, among other
things, the Company's ability to:
       
* incur additional indebtedness and liens;

* make capital expenditures;

* make investments and acquisitions and sell assets; and

* consolidate, merge or sell all or substantially all of its assets.

     At June 30, 2005,  the Company was not in compliance  with its debt service
coverage ratio.  The Company obtained a letter dated August 4, 2005 in which the
lender has  agreed to  forebear  from  exercising  its  rights  under the credit
agreement  against the Company and other borrowers with respect to this event of
default until the  Company has delivered to the lender the  Company's  financial
statements for the year ending December 31, 2005.  Borrowings  outstanding under
this arrangement are guaranteed by GP Strategies.
       
     There can be no assurance that these restrictions will not adversely affect
the  Company's  ability to finance its future  operations or capital needs or to
engage in other business activities that may be in the interest of stockholders.
       
     The  Company  is   dependent  on  product   innovation   and  research  and
development,  which costs are  incurred  prior to revenues  for new products and
improvements.
       
     The  Company  believes  that its  success  will depend in large part on its
ability to maintain and enhance its current product line,  develop new products,
maintain  technological  competitiveness and meet an expanding range of customer
needs. The Company's product development activities are aimed at the development
and expansion of its library of software  modeling tools, the improvement of its
display systems and workstation technologies,  and the advancement and upgrading
of its  simulation  technology.  The life cycles for  software  modeling  tools,
graphical user  interfaces,  and simulation  technology are variable and largely
determined  by  competitive  pressures.  Consequently,  the Company will need to
continue to make significant  investments in research and development to enhance
and expand its  capabilities  in these  areas and to  maintain  its  competitive
advantage.  There can be no assurance  that the Company will have the  financial
resources to support such investments.
       
     The Company relies upon its intellectual property rights for the success of
its  business;  however,  the steps it has  taken to  protect  its  intellectual
property may be inadequate.
       
     Although the Company  believes that factors such as the  technological  and
creative skills of its personnel,  new product  developments,  frequent  product
enhancements and reliable product  maintenance are important to establishing and
maintaining a technological leadership position, the Company's business depends,
in part, on its intellectual  property rights in its proprietary  technology and
information.  The Company relies upon a combination of trade secret,  copyright,
patent and  trademark  law,  contractual  arrangements  and  technical  means to
protect   its   intellectual   property   rights.   The   Company   enters  into
confidentiality  agreements with its employees,  consultants,  joint venture and
alliance partners,  customers and other third parties that are granted access to
its  proprietary  information,  and  limits  access to and  distribution  of its
proprietary  information.  There can be no assurance,  however, that the Company
has  protected  or will  be  able to  protect  its  proprietary  technology  and
information adequately, that the unauthorized disclosure or use of the Company's
proprietary  information  will be  prevented,  that  others have not or will not
develop similar technology or information  independently,  or, to the extent the
Company owns patents,  that others have not or will not be able to design around
those patents. Furthermore, the laws of certain countries in which the Company's
products  are  sold do not  protect  the  Company's  products  and  intellectual
property rights to the same extent as the laws of the United States.
       
     The  industries  in  which  GSE  operates  are  highly  competitive.   This
competition  may prevent the Company from raising prices at the same pace as its
costs increase.
       
     The Company's  businesses operate in highly  competitive  environments with
both domestic and foreign competitors,  many of whom have substantially  greater
financial, marketing and other resources than the Company. The principal factors
affecting competition include price, technological  proficiency,  ease of system
configuration, product reliability, applications expertise, engineering support,
local presence and financial stability. The Company believes that competition in
the  simulation  fields  may  further  intensify  in the  future  as a result of
advances  in  technology,   consolidations   and/or  strategic  alliances  among
competitors,  increased  costs  required  to  develop  new  technology  and  the
increasing  importance  of  software  content in systems  and  products.  As the
Company's  business has a significant  international  component,  changes in the
value of the dollar  could  adversely  affect the  Company's  ability to compete
internationally.
       
     GSE will continue to pursue new acquisitions and joint ventures, and any of
these  transactions  could adversely  affect its operating  results or result in
increased costs or other problems.
       
     The  Company  intends  to  continue  to pursue new  acquisitions  and joint
ventures,  a  pursuit  which  could  consume  substantial  time  and  resources.
Identifying  appropriate acquisition candidates and negotiating and consummating
acquisitions can be a lengthy and costly process. The Company may also encounter
substantial  unanticipated  costs or other problems associated with the acquired
businesses.  The risks inherent in this strategy could have an adverse impact on
the  Company's  results of  operation or  financial  condition.  There can be no
assurance  that the Company  will have the  financial  resources  to fulfill its
strategy.
       
     The nuclear  power  industry,  the Company's  largest  customer  group,  is
associated with a number of hazards which could create  significant  liabilities
for the Company.
       
     The Company's  business  could expose it to third party claims with respect
to product,  environmental and other similar  liabilities.  Although the Company
has sought to protect itself from these potential  liabilities through a variety
of legal and contractual provisions as well as through liability insurance,  the
effectiveness  of such  protections  has not been fully  tested.  Certain of the
Company's products and services are used by the nuclear power industry primarily
in operator  training.  Although the  Company's  contracts for such products and
services  typically  contain  provisions  designed to protect  the Company  from
potential  liabilities  associated with such use, there can be no assurance that
the  Company  would not be  materially  adversely  affected by claims or actions
which may potentially arise.

     The terms of our recent  financing may require us to issue an indeterminate
number  of shares  of our  common  stock and  restrict  us from  taking  certain
actions.
       
     As described in "The Financing," below, we have recently issued and sold to
an investor a senior subordinated  secured convertible note of the Company and a
warrant to purchase shares of our common stock. The note is convertible, in part
or in whole,  into  shares of our common  stock based on a  conversion  price of
$1.925.  However, the conversion price, and thus the number of shares into which
the note may be converted,  is subject to adjustment if we issue or sell certain
shares of common stock or convertible  securities for a consideration  per share
less than the then  effective  conversion  price,  in which case the  conversion
price will be reduced to an amount equal to the  consideration per share in such
new issuance.  The exercise  price of the warrant,  but not the number of shares
for which it is exercisable, is similarly subject to adjustment.
       
     In  addition,  under  the  terms  of  the  financing,  while  the  note  is
outstanding,  the Company may not,  among other  things,  (i)  acquire,  sell or
otherwise transfer any material assets or rights of the Company or a subsidiary,
or enter into any contract or agreement relating to the sale of assets, which is
not  consummated  pursuant  to an arms length  transaction,  (ii) enter into any
contract,  agreement or transaction with any officer,  director,  stockholder or
affiliate of the Company or a subsidiary other than ordinary course transactions
that are consistent with past practice and pursuant to arms length terms,  (iii)
pay or declare any dividend or make any  distribution  upon,  redeem,  retire or
repurchase or otherwise acquire, any shares of capital stock or other securities
of the Company or a subsidiary,  other than certain dividends  currently owed to
ManTech  International  Corp.,  (iv)  materially  change  the  Company's  or any
subsidiary's  line  of  business  as  currently  conducted,  or  (v)  incur  any
additional  indebtedness  senior  to the  note.  Furthermore,  the  note and the
warrant each prevent the Company from  engaging in any  fundamental  transaction
(such  as a  merger,  consolidation,  or  sale  of  the  Company)  while  it  is
outstanding,  unless the successor  assumes in writing all of the obligations of
the Company under it and, the successor is a publicly traded company with common
stock traded on the Amex, Nasdaq, or the New York Stock Exchange.
                                 
                                 THE FINANCING

     On May 26,  2005,  the  Company  issued and sold to Dolphin  Direct  Equity
Partners, L.P. (the "Investor"),  for an aggregate price of $2,000,000, a senior
subordinated  secured convertible note of the Company in the aggregate principal
amount of  $2,000,000  (the  "Note") and a warrant (the  "Warrant")  to purchase
380,952 shares (the "Warrant Shares") of our common stock,  pursuant to a Senior
Subordinated  Secured Convertible Note and Warrant Purchase Agreement,  dated as
of May  26,  2005  (the  "Agreement").  We  refer  to  this  transaction  as the
"Financing." Our board of directors approved the Financing on May 19, 2005.
       
     Our common stock is listed on the American Stock Exchange (the "Amex"), and
we are  therefore  subject to the Amex's  rules.  Under  Section 713 of the Amex
Company  Guide,  companies  with  securities  listed  on the  Amex  must  obtain
stockholder approval before the sale,  issuance,  or potential issuance of their
common stock, or securities  convertible  into their common stock, in connection
with a transaction  other than a public offering,  equal to 20% or more of their
outstanding  common stock,  for less than the greater of book or market value of
their common stock.
       
     The Note is  convertible,  in part or in whole,  into  shares of our common
stock based on a conversion price of $1.925.  However, the conversion price, and
thus the number of shares  into which the Note may be  converted,  is subject to
adjustment.  Under these adjustment provisions,  it is possible that we would be
required to issue,  upon conversion of the Note (when aggregated with the number
of shares of our common stock issued upon exercise of the Warrant),  20% or more
of the outstanding  shares of our common stock on May 26, 2005 for less than the
greater of book or market  value of our  common  stock.  Accordingly,  under the
Amex's  rules,  we are  required  to obtain  stockholder  approval  for any such
issuance.
       
     Under the terms of the Agreement and Note,  notwithstanding  the adjustment
provisions of the Note, the number of shares of our common stock actually issued
or issuable on conversion of the Note, when aggregated with the number of shares
of our common  stock  actually  issued upon  exercise of the  Warrant,  will not
exceed 19.99% of the outstanding shares of our common stock on May 26, 2005 (the
"Conversion Share Limit").  However, the Note provides that the Conversion Share
Limit will terminate upon the effectiveness of the consent to the transaction by
stockholders  holding a majority of the outstanding  shares of our common stock,
in compliance with the stockholder approval requirements of the Amex.
       
     On May 19, 2005, we obtained the written  consent (the "Majority  Consent")
of GP  Strategies,  as holder of a  majority  of the  outstanding  shares of our
common stock. In accordance with Rule 14c-2 under the Securities Exchange Act of
1934, as amended (the "1934 Act"), the  effectiveness  of the Majority  Consent,
and the termination of the Conversion  Share Limit,  became effective on July 1,
2005 (the day  following the  twentieth  day after an  Information  Statement on
Schedule 14C was mailed to our stockholders).  No other approval is necessary or
will be sought.
       
     The following is a summary of the terms of the Financing.
       
     The Agreement.  On May 26, 2005,  pursuant to the Agreement,  we issued the
Note  and the  Warrant  to the  Investor  for an  aggregate  purchase  price  of
$2,000,000, less certain fees we agreed to pay. Of such purchase price, $500,000
was placed in escrow until the termination of the Conversion Share Limit. If the
Conversion Share Limit has not been terminated by the 75th day after the closing
date, the Agreement provides that such $500,000 will be paid to the Investor.
       
     Under the  Agreement,  we have agreed,  among other things,  not to, and to
cause our subsidiaries not to, while the Note is outstanding,  (i) acquire, sell
or  otherwise  transfer  any  material  assets  or rights  of the  Company  or a
subsidiary,  or enter into any  contract  or  agreement  relating to the sale of
assets,  which is not consummated  pursuant to an arms length transaction,  (ii)
enter into any contract,  agreement or transaction  with any officer,  director,
stockholder  or  affiliate of the Company or a  subsidiary  other than  ordinary
course  transactions that are consistent with past practice and pursuant to arms
length terms,  (iii) pay or declare any dividend or make any distribution  upon,
redeem,  retire or repurchase or otherwise acquire,  any shares of capital stock
or other securities of the Company or a subsidiary, other than certain dividends
currently owed to ManTech  International  Corp., or (iv)  materially  change the
Company's or any subsidiary's line of business as currently conducted.
       
     We have agreed to file with the  Securities  and Exchange  Commission  (the
"Commission"),  within 30 days of the closing of the Financing, the registration
statement  of which  this  prospectus  is a part,  to cover  the  resale  by the
Investor  of all shares of common  stock  issuable  pursuant  to the Note or the
Warrant.  We have also agreed to use our best  efforts to have the  registration
statement declared  effective by the Commission as soon as possible  thereafter,
but in no event  later than 90 days after the closing of the  Financing,  and to
keep the registration  statement effective  thereafter until all such securities
have been sold or can be sold without most  restrictions.  If we do not meet the
deadlines for filing and effectiveness of the registration statement, we will be
required to pay  Investor 2% of the  outstanding  principal of the Note for each
30-day period we are late. We have also agreed to provide piggyback registration
rights if at any time there is not an effective  registration statement covering
the resale by the  Investor of all shares of common stock  issuable  pursuant to
the Note or the Warrant.
       
     Note.  The Note is in the  principal  amount of  $2,000,000  and matures on
March 31, 2009. The Note  initially  bears interest at the rate of 8% per annum.
Interest is payable in arrears on the last day of each calendar  quarter and all
principal and accrued interest is payable upon maturity.  The interest rate will
decrease,  for each quarter during which the registration  statement registering
the shares of common stock into which the Note is convertible  is in effect,  by
2% per annum for each 25%  increment  over the  conversion  price then in effect
achieved by our stock price.
       
     The Note is  convertible,  in part or in whole,  into a number of shares of
our common stock equal to the principal and interest of the Note being converted
divided by an initial conversion price of $1.925.  However,  if we issue or sell
any shares of common stock or  securities  exercisable  or  exchangeable  for or
convertible into common stock (excluding certain shares, including shares issued
to the Investor, under certain employee benefit plans or pursuant to outstanding
options or convertible  securities) for a consideration  per share less than the
then effective conversion price, then the conversion price will be reduced to an
amount equal to the consideration per share in such new issuance. The conversion
price will also be appropriately  adjusted upon any stock split, stock dividend,
recapitalization,  combination,  or similar  transaction.  Notwithstanding  such
adjustment  provision,  the number of shares of common stock actually  issued on
conversion of the Note will be limited by  the Conversion  Share Limit until the
effectiveness  of the Majority  Consent on the day  following  the twentieth day
after an Information Statement on Schedule 14C is mailed to our stockholders. If
we fail to issue a  certificate  for the  shares  into  which  the Note has been
converted within three days of such conversion,  we will be required to pay, for
each day we are late,  an amount  equal to 1% of the product of number of shares
to which the Investor is entitled  and the closing  price of our common stock on
the last day we could have delivered such certificate.
       
     Events of default  under the Note  include,  among other  things,  and with
certain cure periods,  the  suspension of trading or failure of our common stock
to be  listed  on one  of  certain  markets,  failure  to  comply  with  certain
agreements  with  Investor  (such as a  failure  to comply  with the  conversion
provisions  of the Note,  a failure to have  sufficient  shares  authorized  for
conversion,  and a failure to pay  principal  or interest  or other  amount when
due), failure to pay material indebtedness,  and bankruptcy. Upon and during the
continuance  of an event of default of the Note, the interest rate will increase
to 24%.  The holder of the Note may  require us to redeem all or any  portion of
the Note upon an event of default for a price equal to the greater of the amount
of the  principal  and interest of the note to be redeemed or the product of the
number of shares of common  stock into  which such  principal  and  interest  is
convertible  multiplied  by  the  closing  trading  price  of the  common  stock
immediately prior to th e event of default.
       
     The  holder of the Note will be  entitled  to  participate  in any pro rata
issuance or sale of securities to our stockholders to the extent that the holder
would have been able to  participate  if the Note had been  converted  to common
stock in its entirety prior to such issuance.
       
     We are  prevented,  under  the  terms of the  Note,  from  engaging  in any
fundamental  transaction  (such  as a  merger,  consolidation,  or  sale  of the
Company)  unless the successor  assumes in writing all of the obligations of the
Company  under the Note and the  successor  is a publicly  traded  company  with
common stock traded on the Amex, Nasdaq, or the New York Stock Exchange.
       
     The Note ranks senior to all other  indebtedness  of the Company other than
debt connected with our senior credit agreement (or any refinancing thereof) and
our  obligation  to repay  GP  Strategies  for  payments  made by GP  Strategies
pursuant to its guaranty of our senior credit  agreement debt, to which the Note
is expressly junior, and certain capitalized leases and contingent  obligations.
We are prohibited from incurring any additional  indebtedness senior to the Note
while the Note is  outstanding.  The ranking is effectuated  by a  subordination
agreement between our senior lender, the Investor, and us.
       
     Warrant.  The Warrant is exercisable for 380,952  Warrant  Shares,  and the
initial  exercise  price is $2.22 per Warrant  Share.  The exercise price of the
Warrant  must be paid in cash,  except that if a  registration  statement is not
available  for the resale of  Warrant  Shares,  the holder may make a  "cashless
exercise" of the Warrant.  The Warrant expires on the seventh anniversary of its
issuance.
       
     If we issue or sell any shares of common stock or securities exercisable or
exchangeable  for or convertible  into common stock  (excluding  certain shares,
including shares issued to the Investor, under certain employee benefit plans or
pursuant to outstanding  options or convertible  securities) for a consideration
per share less than the then effective  exercise price,  then the exercise price
will be reduced to an amount  equal to the  consideration  per share in such new
issuance,  without  adjustment  to the  number of  Warrant  Shares  issuable  on
exercise.  The  exercise  price  and  number  of  Warrant  Shares  will  also be
appropriately  adjusted upon any dividend or distribution  of assets  (including
any  distribution  of cash,  securities  or other  property by way of  dividend,
spin-off,  reclassification,  or similar  transaction) and upon any stock split,
recapitalization,  combination,  or similar  transaction.  If we fail to issue a
certificate for the shares for which the Warrant has been exercised within three
days of such  conversion,  we will be required to pay, for each day we are late,
an amount  equal to 1% of the product of number of shares to which the  Investor
is entitled  and the closing  price of our common stock on the last day we could
have delivered such certificate.
       
     The holder of the Warrant will be entitled to  participate  in any pro rata
issuance or sale of securities to our stockholders to the extent that the holder
would have been able to  participate  if the Warrant had been  exercised  in its
entirety prior to such issuance.
       
     We are  prevented,  under the terms of the  Warrant,  from  engaging in any
fundamental  transaction  (such  as a  merger,  consolidation,  or  sale  of the
Company)  unless the successor  assumes in writing all of the obligations of the
Company  under the Warrant and the successor is a publicly  traded  company with
common stock traded on the Amex, Nasdaq, or the New York Stock Exchange.
       
     Security. We have granted the Investor a second priority lien on all of our
and our subsidiaries' assets.

                              SELLING STOCKHOLDER

     The shares of common  stock being  offered by the selling  stockholder  are
issuable  upon  conversion  of the Notes or upon  exercise of the  Warrant.  For
additional  information regarding the issuance of the Note and Warrant, see "The
Financing"  above.  We are  registering  the shares of common  stock in order to
permit the selling stockholder to offer the shares for resale from time to time.
Except for the ownership of the Note and Warrant,  the selling  stockholder  has
not had any material relationship with us within the past three years.
       
     The table below lists the following  information  regarding the  beneficial
ownership  of the  shares of common  stock by the  selling  stockholder,  to our
knowledge:

*    the  number of shares of common  stock  beneficially  owned by the  selling
     stockholder,  based on its ownership of the Note and Warrant,  as of August
     23, 2005,  assuming  conversion in full of the Note and exercise in full of
     the Warrant on that date,  without regard to the Conversion  Share Limit;

*    the number of shares of common stock being offered through this prospectus;
     and

*    the number and percentage of our  outstanding  shares of common stock to be
     beneficially  owned by the  selling  stockholder  after  the sale of common
     stock being offered through this prospectus.

     The selling shareholders may sell all, some or none of their shares in this
offering. See "Plan of Distribution."


                         

                                                                           
                                                                            Number of           Shares Beneficially Owned
                                               Number of Shares          Shares Offered             After the Offering
                                              Beneficially Owned             by this                ------------------
Selling Stockholder                          Prior to the Offering         Prospectus           Number          Percentage
-------------------                          ---------------------         ----------           ------          ----------
                                                                                       
Dolphin Direct Equity Partners, L.P. (1)           1,419,913              1,503,030(2)            -                 -



(1) Dolphin  Advisers,  LLC ("Dolphin  Advisors")  is the sole managing  general
partner of Dolphin Direct Equity  Partners,  L.P.  ("Dolphin  Direct").  Dolphin
Management  Inc.  ("Dolphin  Management") is the sole managing member of Dolphin
Advisors.  Peter E.  Salas is the sole  shareholder  and  President  of  Dolphin
Management.  By  reason  of  such  relationships,   Dolphin  Advisors,   Dolphin
Management,  and Mr.  Salas may be deemed to share  dispositive  power  over the
shares of common stock stated as beneficially  owned by Dolphin Direct.
(2) The  Note  provides  that  accrued  interest  as well  as  principal  can be
converted into common stock. Included are 83,117 shares of common stock that may
be issuable upon conversion of $160,000 of accrued interest.

                                USE OF PROCEEDS
    
     We will not  receive  any of the  proceeds  from  sales of shares of common
stock  by the  selling  stockholder.  However,  we  would  receive  proceeds  of
approximately  $845,713 if the  Warrant  issued to the  selling  stockholder  is
exercised for cash at an exercise  price of $2.22 per share.  The funds would be
used for general corporate purposes.
    
                              PLAN OF DISTRIBUTION
       
     We are  registering  the shares of common stock issuable upon conversion of
the Note and the Warrant to permit the resale of the underlying shares of common
stock by the holders  from time to time after the date of this  prospectus.  The
selling  stockholders  may sell all or a portion of the securities  beneficially
owned by them and offered  hereby  from time to time  directly or through one or
more  underwriters,  broker-dealers or agents. The securities may be sold in one
or more transactions at fixed prices, at prevailing market prices at the time of
the sale,  at varying  prices  determined  at the time of sale, or at negotiated
prices.  These sales may be effected in transactions,  which may involve crosses
or block transactions,
    
     *    on any national  securities exchange or quotation service on which the
          securities may be listed or quoted at the time of sale;

     *    in the over-the-counter market;

     *    otherwise   than   on   these   exchanges   or   systems   or  in  the
          over-the-counter market;

     *    through the writing of options,  whether such options are listed on an
          options exchange or otherwise;

     *    consisting of ordinary  brokerage  transactions  and  transactions  in
          which the broker-dealer solicits purchasers;

     *    consisting of block trades in which the broker-dealer  will attempt to
          sell the  securities as agent but may position and resell a portion of
          the block as principal to facilitate the transaction;

     *    through  purchases by a  broker-dealer  as principal and resale by the
          broker-dealer for its account;

     *    through an exchange  distribution  in accordance with the rules of the
          applicable exchange;

     *    consisting of privately negotiated transactions;

     *    consisting of short sales;

     *    pursuant to Rule 144 under the Securities Act;

     *    in which  broker-dealers  may agree with the selling  stockholders  to
          sell a specified  number of such securities at a stipulated  price per
          security;

     *    consisting of a combination of any such methods of sale; or

     *    by any other  method  permitted  pursuant  to  applicable  law.

     If the selling  stockholders effect such transactions by selling the shares
of common  stock to or through  underwriters,  broker-dealers  or  agents,  such
underwriters,  broker-dealers  or agents may receive  commissions in the form of
discounts,   concessions  or  commissions  from  the  selling   stockholders  or
commissions  from purchasers of the shares of common stock for whom they may act
as agent or to whom they may sell as principal (which discounts,  concessions or
commissions as to particular  underwriters,  broker-dealers  or agents may be in
excess of those customary in the types of transactions  involved). In connection
with sales of any securities or otherwise,  the selling  stockholders  may enter
into hedging transactions with broker-dealers, which may in turn engage in short
sales of the  securities  in the  course of hedging in  positions  they  assume.
Subject to any contrary terms of the  Agreement,  the selling  stockholders  may
also sell securities short and deliver  securities covered by this prospectus to
close out  short  positions.  The selling  stockholders  may also loan or pledge
securities to broker-dealers that in turn may sell such securities.
       
     The selling stockholders may pledge or grant a security interest in some or
all of  shares  of  common  stock  owned by them  and,  if they  default  in the
performance of their secured  obligations,  the pledgees or secured  parties may
offer and sell  shares  of  common  stock  from  time to time  pursuant  to this
prospectus or any  amendment to this  prospectus  under Rule  424(b)(3) or other
applicable provision of the Securities Act of 1933, as amended (the "1933 Act"),
amending, if necessary, the list of selling stockholders to include the pledgee,
transferee or other  successors in interest as selling  stockholders  under this
prospectus.  The selling stockholders also may transfer and donate the shares of
common  stock in other  circumstances  in which  case the  transferees,  donees,
pledgees or other successors in interest will be the selling  beneficial  owners
for purposes of this prospectus.
       
     The  selling  stockholders  and  any  broker-dealer  participating  in  the
distribution  of the shares of common  stock may be deemed to be  "underwriters"
within the meaning of the 1933 Act, and any commission paid, or any discounts or
concessions  allowed to, any such broker-dealer may be deemed to be underwriting
commissions or discounts  under the 1933 Act. At the time a particular  offering
of the  securities  is made,  a  prospectus  supplement,  if  required,  will be
distributed  which  will set forth the  aggregate  amount  of  securities  being
offered  and the  terms  of the  offering,  including  the  name or names of any
broker-dealers   or  agents,   any  discounts,   commissions   and  other  terms
constituting  compensation  from the  selling  stockholders  and any  discounts,
commissions or concessions allowed or reallowed or paid to broker-dealers.
       
     Under the  securities  laws of some states,  the  securities may be sold in
such states only through registered or licensed brokers or dealers. In addition,
in some states the shares of common  stock may not be sold unless such shares of
common  stock have been  registered  or  qualified  for sale in such state or an
exemption from registration or qualification is available and is complied with.
       
     The selling  stockholders  may choose not to sell any or may choose to sell
less than all of the shares of common  stock  registered  pursuant  to the shelf
registration statement, of which this prospectus forms a part.
       
     The  selling  stockholders  and  any  other  person  participating  in such
distribution  will be subject to applicable  provisions of the 1934 Act, and the
rules and regulations thereunder, including, without limitation, Regulation M of
the 1934 Act,  which may limit the timing of  purchases  and sales of any of the
shares of common stock by the selling  stockholders and any other  participating
person.  Regulation M may also restrict the ability of any person engaged in the
distribution of the shares of common stock to engage in market-making activities
with respect to the shares of common stock.  All of the foregoing may affect the
marketability  of the  shares of common  stock and the  ability of any person or
entity to engage in  market-making  activities  with  respect  to the  shares of
common stock.
       
     We will pay all expenses of the  registration  of the common stock pursuant
to the Agreement;  provided,  however,  that a selling  stockholder will pay all
underwriting discounts and commissions and selling commissions,  if any. We will
provide  customary   indemnification   of  the  selling   stockholders   against
liabilities, including some liabilities under the 1933 Act.
       
     Once sold under the registration  statement, of which this prospectus forms
a part,  the  shares of common  stock  will be freely  tradable  in the hands of
persons other than our affiliates.

                                 LEGAL MATTERS

     Certain legal matters with respect to the shares of common stock offered by
this  prospectus  have been passed upon by Andrea D. Kantor,  General Counsel of
the Company.

                                    EXPERTS
       
     The  consolidated  financial  statements of GSE Systems Inc. as of December
31,  2004 and 2003,  and for each of the years in the  three-year  period  ended
December  31,  2004,  have been  incorporated  by  reference  herein  and in the
registration  statement  in  reliance  upon the report of KPMG LLP,  independent
registered  public accounting firm,  incorporated by reference herein,  and upon
the authority of said firm as experts in accounting and auditing.

                      WHERE YOU CAN FIND MORE INFORMATION
       
     We file annual,  quarterly and special reports,  proxy statements and other
information  with the SEC.  You may  read and copy any  document  we file at the
public  reference  facilities of the SEC located at Station Place,  100 F Street
NE,  Washington D.C. 20549.  You may obtain  information on the operation of the
SEC's public reference facilities by calling the SEC at 1-800-SEC-0330.  You can
also access copies of this material electronically on the SEC's home page on the
World Wide Web at http://www.sec.gov.
       
     This  prospectus  is part of a  registration  statement  (Registration  No.
333-126108)  we filed  with the  SEC.  The SEC  permits  us to  "incorporate  by
reference" the  information we file with them,  which means that we can disclose
important  information  to  you  by  referring  you  to  those  documents.   The
information  incorporated  by  reference  is  considered  to  be  part  of  this
prospectus,  and  information  that we file  with the SEC after the date of this
prospectus will  automatically  update and supersede this information.  However,
any information contained herein shall modify or supersede information contained
in  documents  we filed  with the SEC  before  the date of this  prospectus.  We
incorporate  by  reference  our  Annual  Report on Form 10-K for the year  ended
December 31, 2004, filed on March 17, 2005, our Annual Report on Form 10-K/A for
the year ended  December 31, 2004,  filed on May 2, 2005,  our Annual  Report on
Form 10-K/A for the year ended December 31, 2004,  filed on August 15, 2005, our
Quarterly  Report on Form 10-Q  for the quarter  ended March 31, 2005,  filed on
May 16, 2005,  our  Quarterly  Report on Form 10-Q/A for the quarter ended March
31, 2005,  filed on August 16, 2005,  our Quarterly  Report on Form 10-Q for the
quarter ended June 30, 2005,  filed on August 15, 2005,  our Current  Reports on
Form 8-K,  filed on March 18, 2005,  May 11,  2005,  May 27, 2005 and August 11,
2005,  our  Current  Report on Form  8-K/A,  filed on August 16,  2005,  and the
description of our common stock contained in our registration statement pursuant
to Section 12 of the  Exchange  Act,  and any  amendment or report filed for the
purpose of updating  such  description,  filed by us with the SEC. In  addition,
until we sell all of the shares of common stock being  registered  or until this
offering is otherwise terminated, we incorporate by reference any future filings
made  with the SEC  under  Section  13(a),  13(c),  14 or 15(d) of the 1934 Act,
except for  information  furnished  under Item 2.02 or 7.01 of Current Report on
Form 8-K, or exhibits related thereto, which is deemed not to be incorporated by
reference herein.

     You may write or  telephone us to obtain at no cost a copy of any or all of
the documents  incorporated by reference.  You should direct written requests to
9189 Red Branch Road, Columbia,  Maryland 21045, Attn: Secretary.  Our telephone
number is (410) 772-3500.  However, we will not send you exhibits to a document,
unless the exhibits are specifically incorporated by reference in the document.
       
--------------------------------------------------------------------------------

                               GSE SYSTEMS, INC.


                                  COMMON STOCK
                                 
                                   PROSPECTUS
                                   

                                 AUGUST , 2005

--------------------------------------------------------------------------------


                                    PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution. 
   
     The  following  table  sets  forth the  expenses  in  connection  with this
offering. All of the amounts (except the SEC registration fee) are estimated.

                         


        SEC registration fee                                    $  326
        Legal fees and expenses                                 12,000
        Accounting fees and expenses                             4,000
                                                               -------
                Total                                          $16,326
                                                               =======

Item 15.  Indemnification of Directors and Officers. 
   
     Under Section 145 of the General  Corporation  Law of the State of Delaware
(the "DGCL"), a corporation may indemnify its directors, officers, employees and
agents and its former  directors,  officers,  employees and agents and those who
serve, at the corporation's request, in such capacities with another enterprise,
against expenses  (including  attorney's fees), as well as judgments,  fines and
settlements  in  nonderivative  lawsuits,  actually and  reasonably  incurred in
connection  with the defense of any action,  suit or proceeding in which they or
any of them were or are made  parties or are  threatened  to be made  parties by
reason of their serving or having served in such  capacity.  The DGCL  provides,
however,  that such  person  must have acted in good faith and in a manner he or
she  reasonably  believed to be in (or not opposed to) the best interests of the
corporation and, in the case of a criminal action,  such person must have had no
reasonable  cause to believe his or her conduct was unlawful.  In addition,  the
DGCL does  not permit indemnification in an action or suit by or in the right of
the corporation,  where such person has been adjudged liable to the corporation,
unless,  and only to the extent that, a court determines that such person fairly
and  reasonably  is entitled to  indemnity  for costs the court deems  proper in
light of liability  adjudication.  Indemnity is mandatory to the extent a claim,
issue or matter has been successfully defended.

     The Company's Third Amended and Restated  Certificate of Incorporation (the
"Restated  Certificate")  provides  that the Company  shall  indemnify  and hold
harmless,  to the fullest  extent  permitted by Section 145 of the DGCL,  as the
same may be amended and supplemented, every person who was or is made a party or
is threatened to be made a party or is otherwise involved in any action, suit of
proceeding  by  reason  of the fact that  such  person  is or was  serving  as a
director or officer of the Company or, while  serving as a a director or officer
of the  Company,  is or was serving at the request of the Company as a director,
trustee, officer, employee or agent of another corporation,  partnership,  joint
venture,  trust or other  enterprise,  against all expense,  liability  and loss
reasonably  incurred or suffered by such person in connection  therewith if such
person  satisfied the  applicable  level of care to permit such  indemnification
under  the  DGCL.  The  Restated  Certificate  provides  that,  subject  to  any
requirements   imposed  by  law  or  the  Company's   Bylaws,   the   right   to
indemnification includes the right to be paid expenses incurred in defending any
proceeding  in advance  of its final  disposition.  The  Company's  Amended  and
Restated By-Laws (the "By-Laws")  provide that, if and to the extent required by
the DGCL, such an advance payment will only be made upon delivery to the Company
of an  undertaking,  by or on behalf of the  director or  officer,  to repay all
amounts so advanced if it is  ultimately  determined  that such  director is not
entitled to indemnification.

     Section  102(b)(7)  of the DGCL  permits a  corporation  to  include in its
certificate of  incorporation  a provision  eliminating or limiting the personal
liability  of a director to the  corporation  or its  stockholders  for monetary
damages for breach of fiduciary duty as a director, provided that such provision
shall not  eliminate or limit the  liability of a director (i) for any breach of
the director's duty of loyalty to the corporation or its stockholders,  (ii) for
acts or omissions not in good faith or which involve intentional misconduct or a
knowing  violation  of law,  (iii) under  Section 174 of the DGCL  (relating  to
unlawful  payment of dividends and unlawful  stock  purchase and  redemption) or
(iv) for any transaction  from which the director  derived an improper  personal
benefit.
    
     The  Restated  Certificate  also  provides  that a director  shall,  to the
maximum  extent  permitted by Section  102(b)(7)  of the DGCL (or any  successor
provision),  have no personal  liability to the Company or its  stockholders for
monetary damages for breach of fiduciary duty as a director.

Item 16.  Exhibits.

Number                      Description
------                      -----------

        5.1     Opinion of Andrea D. Kantor*

       23.1     Consent of KPMG LLP

       23.2     Consent of Andrea D. Kantor*

       24.1     Powers of Attorney*

*Previously filed

Item 17.  Undertakings. 
       
     (a) The undersigned Registrant hereby undertakes:

          (1) To file,  during  any  period  in which  offers or sales are being
made, a post-effective amendment to this registration statement:

               (i) To include any prospectus  required by section 10(a)(3)of the
Securities Act of 1933.

               (ii) To reflect  in the  prospectus  any facts or events  arising
after the effective date of the registration statement (or the most recent post-
effective amendment  thereof) which, individually or in the aggregate, represent
a fundamental change in the information set forth in the registration statement.
Notwithstanding the foregoing, any increase  or decrease in volume of securities
offered (if the total dollar  value of  securities offered would not exceed that
which was registered)  and  any  deviation  from  the  low  or  high  end of the
estimated  maximum  offering  range  may be  reflected in the form of prospectus
filed with the  Commission  pursuant  to  Rule 424(b) if, in the aggregate,  the
changes in volume and price represent  no  more than a 20% change in the maximum
aggregate offering price set forth  in  the "Calculation  of  Registration  Fee"
table in the effective  registration statement.

               (iii) To include any  material  information  with  respect to the
plan of  distribution  not  previously  disclosed in the  registration statement
or any  material  change  to  such  information  in  the registration statement.

Provided,  however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
registration  statement is on Form S-3 or Form S-8, and the information required
to be included in a post-effective amendment by those paragraphs is contained in
periodic reports filed by the registrant pursuant to section 13 or section 15(d)
of the Securities and Exchange Act of 1934 that are incorporated by reference in
the registration statement.

          (2)  That,  for the purpose of  determining  any  liability  under the
Securities  Act,  each  such  post-effective  amendment  shall be deemed  to  be
a  new registration statement relating  to  the securities  offered therein, and
the offering of such securities  at that time shall be deemed  to be the initial
bona fide offering thereof.

          (3)  To  remove  from   registration  by  means  of  a  post-effective
amendment any of  the  securities  being  registered  which remain unsold at the
termination of the offering.

     (b) The  undersigned  Registrant  hereby  undertakes  that, for purposes of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
Registrant'  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan'  annual  report  pursuant  to  Section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     (c) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors,  officers and controlling  persons of
the  Registrant  pursuant  to  the  foregoing  provisions,   or  otherwise,  the
Registrant  has been advised that in the opinion of the  Securities and Exchange
Commission  such  indemnification  is against  public policy as expressed in the
Securities  Act of 1933 and is,  therefore,  unenforceable.  In the event that a
claim for  indemnification  against such liabilities  (other than the payment by
the  Registrant  of  expenses  incurred  or  paid  by  a  director,  officer  or
controlling  person of the Registrant in the  successful  defense of any action,
suit or proceeding) is asserted by such director,  officer or controlling person
in connection with the securities being registered,  the Registrant will, unless
in the  opinion  of its  counsel  the matter  has been  settled  by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification  by it is  against  public  policy  as  expressed  in  the
Securities Act and will be governed by the final adjudication of such issue.

                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing on Form S-3 and has duly  caused  this  Post-Effective
Amendment  No. 1 to  registration  statement  to be signed on its  behalf by the
undersigned,  thereunto duly authorized,  in the City of Columbia,  the State of
Maryland, on the 23rd day of August, 2005.
        
                                          GSE SYSTEMS, INC.

                                          BY:  /s/ John V. Moran
                                             -----------------------------------
                                                 Name:  John V. Moran
                                                 Title:  Chief Executive Officer



     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Post-Effective  Amendment No. 1 to registration statement has been signed by the
following persons in the capacities and on the 23rd day of August, 2005.


                                                        *
                                        ------------------------------
                                        John V. Moran
                                        Chief Executive Officer and Director
                                        (Principal Executive Officer)


                                                        *
                                        ------------------------------
                                        Jeffery G. Hough
                                        Senior Vice President and Chief
                                        Financial Officer and Director
                                        (Principal Financial and Accounting
                                        Officer)


                                                        *
                                        ------------------------------
                                        Jerome I. Feldman
                                        Chairman of the Board


                                                        *
                                        ------------------------------
                                        Dr. Sheldon L. Glashow
                                        Director


                                                        *
                                        ------------------------------
                                        Scott N. Greenberg
                                        Director

                                                        *
                                        ------------------------------
                                        Dr. Roger Hagengruber
                                        Director


                                                        *
                                        ------------------------------
                                        Chin-our Jerry Jen
                                        Director


                                                        *     
                                        ------------------------------
                                        Andrea Kantor
                                        Director


                                                        *
                                        ------------------------------
                                        Joseph W. Lewis
                                        Director                            


                                                        *
                                        ------------------------------
                                        George J. Pedersen
                                        Director                              


                                                        *
                                        ------------------------------
                                        Douglas Sharp
                                        Director                             


*       By: /s/ Jeffery G. Hough
           -------------------------------
        Jeffery G. Hough, Attorney-in-Fact
        Pursuant to Power of Attorney, dated June 16, 2005


                                 EXHIBIT INDEX


Number                          Description
------                          -----------

        5.1             Opinion of Andrea D. Kantor*

       23.1             Consent of KPMG LLP

       23.2             Consent of Andrea D. Kantor*

       24.1             Powers of Attorney*

* Previously filed